IMO you can't do it. well, you can do it, but it will cause you a big f'n headache. No matter what either of you say, you will bring your personal life to work. Most people do. If you care about your job..and your job depends on your performance, i don't think i'd keep up on that relationship. If you guys are just hanging out doin whatever, then its all good. Girls get possessive. So do guys. It could get ugly. if it was me, i'd bite the bullet and move on, but its not me. Do what you feel is right.